I'm in the process of setting up a MOSS 2007 (with IIS7 and Server 2008) intranet and am looking to find a way to prevent people from having to log in when they want to view the site. Ideally, I would like SharePoint to draw from the user's Active Directory account without having to enable guest access. Can anyone tell me how to do this or have any good resources that describe how to get this done?

Just for the record--I have tried searching Google for the answers but apparently I'm not using the right terms to find what I need.

I have found that if the SharePoint box is in the domain, this pretty much happens automatically assuming your client machines are in the domain and are using their domain accounts to logon to Windows.